To say 2011 was the Year of the Celebrity Baby is an understatement.
The Hollywood Baby Boom was in full speed this year, with stars including Natalie Portman, Alicia Silverstone, Orlando Bloom and Mariah Carey all joining the celebrity parent club.
An interesting fact: Toni Collette and "Jackass" star Johnny Knoxville both welcomed babies named Arlo this year, with Collette having a boy and Knoxville welcoming a girl.
Also, three Spices Girls welcomed babies this year: Victoria Beckham, Emma Bunton and Melanie Brown, which must make for some pretty hectic reunions.
With all the new babies in Hollywood in 2011, we can only imagine the star power that will be at the playgrounds in Hollywood in the next few years.
Check out some celebrities who have welcomed new children into their families this year below!